C++ program that uses C++20 Corotuines and io_uring. Implementation explained in the blog series

You will need a Linux kernel version 5.1 or higher and have liburing installed. Your C++ compiler must support C++20 and coroutines.

cmake -Bbuild -DCMAKE_BUILD_TYPE=Release
cmake --build build

Download any OBJ file you want from the internet and put them in folder.

To make things interesting you'll need hundreds of them, you can duplicate a OBJ file switch with a bash one-liner

for i in {1..5000} do cp my_file.obj my_file_$1.obj done

Once you have all obj files on disk you can invoke the tool by passing the directory containing them.

./build/couring /folder_containing_obj_files <implementation>

There are five different implementations of the algorithm:

--trivial: Single-threaded synchronous implementation

--thread-pool Multi-threaded synchronous implementation

--iouring Single-threaded asynchronous implementation using iouring

--coroutines asynchronous implementation with coroutines with iouring, parsing single-threaded

--coro-pool asynchronous implementation with coroutines with iouring, parsing multi-threaded

There is a convenience script that runs all implementations and times them:

> ./run_all build /folder_containing_obj_files
#########
Running trivial implementation
Processed 512 files.

real	0m0.419s
user	0m0.371s
sys	0m0.046s
#########
Running multi-threading implementation
Processed 512 files.

real	0m0.177s
user	0m0.599s
sys	0m0.026s
#########
Running iouring implementation
Processed 512 files.

real	0m0.368s
user	0m0.317s
sys	0m0.050s
#########
Running couroutines implementation
Processed 512 files.

real	0m0.339s
user	0m0.305s
sys	0m0.033s
#########
Running coroutines thread pool implementation
Processed 512 files.

real	0m0.230s
user	0m0.732s
sys	0m0.047s